I dont know much about The 7600 but i do know that it has the new SLI technology unlike the 6200. If you're building an SLI PC, (using two video cards at once), then you should get the 7600.It also has new technologies from NVIDIA like Ultrashadow 2 and PureVideo. You can go to www.nvidia.com
to read more about the video cards and what technologies they have.
I know for a fact that both cards can run basically any FPS. Not sure about Final Cut, but i know that the 7600 can run 3D Studio.